<template>
  <div>
       <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>   
        </el-breadcrumb>
    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary" @click="showAddCatDialog" >添加商品</el-button>
            </el-col>
        </el-row>
        <!-- 表格 -->
        <zk-table :data="catelist" :columns="columns" :seletion-type="false" :expand-type="false" show-index index-text="#"
        border :show-row-hover="false">
        <!-- 在表格内部定义了一个作用域插槽 -->
            <template slot="isOk" slot-scope="scope">
                <i class="el-icon-success" style="color:lightgreen" v-if="scope.row.cat_deleted === false"></i>
                <i class="el-icon-error" style="color:red" v-else></i>
            </template>
            <template slot="order" slot-scope="scope">
                <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
                <el-tag type="success" size="mini" v-else-if="scope.row.cat_level === 1">二级</el-tag>
                <el-tag type="warning" size="mini" v-else>三级</el-tag>
            </template>
            <template slot="opt" >
                <!-- 删除和编辑功能还没写 -->
                <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini"></el-button>
            </template>
        </zk-table>
        <!-- 分页 -->
        <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page.sync="queryInfo.pagenum"
            :page-sizes="[5,10,15,10]" :page-size="queryInfo.pagesize" layout="sizes, prev, pager, next" :total="total" class="treetable">
        </el-pagination>
    </el-card>
    <!-- 添加分类的对话框 -->
    <el-dialog title="添加分类" :visible.sync="addCatDialogVisible" width="50%" @close="addCatDialogClosed" ref="addCateFormRef">
        <el-form :model="addCatForm" :rules="addCatFormRules" ref="addCatFormRuleForm" label-width="100px" >
            <el-form-item label="分类名称：" prop="cat_name">
                <el-input v-model="addCatForm.cat_name"></el-input>
            </el-form-item>
            <el-form-item label="父级分类" >
                <!-- options用来指定数据源 -->
                <el-cascader v-model="selectedKeys" :options="parentCatList" 
                :props="cascaserprops" @change="parentCateChanged" clearable >

                </el-cascader>
            </el-form-item>
        </el-form>

        <span slot="footer" class="dialog-footer">
            <el-button @click="addCatDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addCat">确 定</el-button>
        </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
    data() {
        return {
            catelist:[],
            queryInfo:{
                type:3,
                pagenum:1,
                pagesize:5
            },
            total:0,
            columns:[
                {label:'分类名称',prop:'cat_name'},
                {label:'是否有效',type:'template',template:'isOk'}, //模板列
                {label:'排序',type:'template',template:'order'},
                {label:'操作',type:'template',template:'opt'}
            ],
            addCatDialogVisible:false,
            addCatForm:{
                cat_name:'',
                cat_pid:0,
                cat_level:0
            },
             addCatFormRules:{
                cat_name:[
                    { required: true, message: '请输入分类名称', trigger: 'blur' }
                ]
            },
            parentCatList:[],
            //指定级联选择器的配置项
            cascaserprops:{
                expandTrigger: 'hover',
                value:'cat_id',
                label:'cat_name',
                children:'children',
                checkStrictly:true
            },
            //选中的id
            selectedKeys:[]
        }
    },
    created() {
        this.getCateList()
    },
    methods:{
        async getCateList() {
            const {data:res} = await this.$http.get('categories',{params:this.queryInfo})
            if(res.meta.status !== 200) {
                return this.$message.error('获取商品分类失败')
            }
            this.catelist = res.data.result
            this.total = res.data.total

        },
        // 监听pagesize 的改变
        handleSizeChange(newsize) {
            this.queryInfo.pagesize = newsize
            this.getCateList()
        },
        // 监听pagenum的改变
        handleCurrentChange(newpage) {
            this.queryInfo.pagenum = newpage
            this.getCateList()
        },
        showAddCatDialog() {
            this.getParamsCateList()
            this.addCatDialogVisible = true
        },
        async getParamsCateList() {
            const {data:res} = await this.$http.get('categories',{params:{type:2}})
            if(res.meta.status !== 200) {
                this.$message.error('获取分类数据失败')
            }
            this.$message.success('获取分类数据成功')
            // console.log(res.data);
            this.parentCatList = res.data
            console.log(this.parentCatList);
        },
        parentCateChanged() {
            if(this.selectedKeys.length > 0) {
                // 父级分类的id
               this.addCatForm.cat_pid =  this.selectedKeys[this.selectedKeys.length - 1]
               this.addCatForm.cat_level = this.selectedKeys.length
               return
            }else{
                this.addCatForm.cat_pid = 0
                this.addCatForm.cat_level
            }
        },
        addCat() {
            this.$refs.addCatFormRuleForm.validate(async valid => {
                if(!valid) return
                const {data:res} = await this.$http.post('categories',this.addCatForm)
                if(res.meta.status !== 201) {
                    return this.$message.error('添加分类失败')
                }
                this.$message.success('添加分类成功')
                this.getCateList()
                this.addCatDialogVisible = false
            })
        },
        addCatDialogClosed() {
            this.$refs.addCatFormRuleForm.resetFields()
            this.selectedKeys = []
            this.addCatForm.cat_level = 0
            this.addCatForm.cat_pid = 0
        }
    }
}
</script>

<style>
.treetable{
    margin-top: 15px;
}
.zk-table{
     margin-top: 15px;
}
</style>